I can't animate my Shape keys
You mast create a driver to the Shape key mix value for manipulating this value from a Armature.


In Shape keys click on Value of your Shape key and select Add Driver -> manually create later. Or press Ctrl + D while hovering value slider by mouse. Driver will be violet:





Next in Graph editor - select Drivers mode:





On N -> Drivers panel setup driver like this:




Finally, check, can you manipulate shape key by moving bone in Pose mode? 

And at last, in new scene press Ctrl + Alt +P -> select armature object. It will creates a local copy of armature, and you will be able to manipulate the bone, that control your Shape key.